Sputtering Holes with Ion Beamlets [PDF]
, 1974 Ion beamlets of predetermined configurations are formed by shaped apertures in the screen grid of an ion thruster having a double grid accelerator system. A plate is placed downstream from the screen grid holes and attached to the accelerator grid.
Banks, B. A., Byers, D. C.
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Hierarchical Cooperative Multitarget Allocation Strategy of Multiple Spacecrafts
International Journal of Aerospace Engineering, Volume 2026, Issue 1, 2026.In the future space missions, multispacecraft collaboration has become increasingly significant due to the inherent limitations of a single spacecraft in executing complex tasks. To address the coordination challenges associated with multispacecraft systems, a novel hierarchical mission planning framework is proposed in this paper.
Mengping Zhu +4 more
wiley +1 more source
Development of dispersion strengthened tantalum base alloy Eighth quarterly progress report, 20 Aug. - 20 Nov. 1965 [PDF]
Phase identification and morphology studies of dispersion hardened tantalum base alloys for advanced space power ...
Buckman, R. W., Jr., Goodspeed, R. C.
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Probability of brittle failure [PDF]
A methodology was developed for collecting statistically representative data for crack initiation and arrest from small number of test specimens. An epoxy (based on bisphenol A diglycidyl ether and polyglycol extended diglycyl ether and cured with ...
Bosnyak, C. P., Chudnovsky, A., Kim, A.
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High-frequency techniques for RCS prediction of plate geometries and a physical optics/equivalent currents model for the RCS of trihedral corner reflectors [PDF]
Part 1 of this report continues the investigation, initiated in previous reports, of scattering from rectangular plates coated with lossy dielectrics.
Balanis, Constantine A. +2 more
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Analysis of the dynamics of a nutating body [PDF]
The equations for the displacement, velocity, and acceleration of a point in a nutating body are developed. These are used to derive equations for the inertial moment developed by a nutating body of arbitrary shape.
Anderson, W. J.
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Three dimensional viscous analysis of a hypersonic inlet [PDF]
The flow fields in supersonic/hypersonic inlets are currently being studied at NASA Lewis Research Center using 2- and 3-D full Navier-Stokes and Parabolized Navier-Stokes solvers.
Benson, Thomas J. +3 more
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GRID3O: Computer program for fast generation of multilevel, three-dimensional boundary-conforming O-type computational grids [PDF]
A fast algorithm was developed for accurately generating boundary-conforming, three-dimensional, consecutively refined computational grids applicable to arbitrary wing-body and axial turbomachinery geometries.
Dulikravich, D. S.
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National Aeronautics and Space Administration (NASA)
The Grants Register 2021, 2018 semanticscholar +1 more source
STB-Net: a Siamese architecture-based reconstruction-segmentation network for ocular surface image segmentation. [PDF]
Quant Imaging Med SurgWan C, Wu J, Mao Y, Yang W, Yang Y.
europepmc +1 more source